[argonaut]

I'm pretty sure that pickup d44 front axles are wider than blazers in the 60-72 years. But even if that is the case, no one will know but you.

Although another option would be to get the disk brake axle and then swap everything from the knuckles out onto your axle housing. You'll also need to use your inner axle shafts connected to the disk stub shafts. Great opportunity to install new ball joints and new u-joints.

For the rear 12 bolt, there are many kits to adapt small calipers. Don't buy the kit that CPP sells, it doesn't fit well in my experience.